Why was water important to the development of the Fertile Crescent?

Which of the following is not a challenge to instituting sound global environmental policies? a. most changes are inexpensive and easy to implement. b. elected leaders who support unpopular environmental issues often are not re-elected. c. economic considerations outweigh environmental ones in many societies. d. there is no way to enforce international environmental agreements.

What are some of the impacts of humans on the earth?

In a class of 20 students, what democratic form of governance makes the most sense